It's about four times as big as a Hot Tub
In other words, 2,700 liters is 3.760 times the size of a Hot Tub, and the size of a Hot Tub is 0.2660 times that amount.(for Lifesmart Rock Solid Simplicity Plug and Play 4 Person Spa With 12 Jets) (a.k.a. Spa, a.k.a. Jacuzzi, a.k.a. Whirlpool) (Advertised Capacity)
An average, four-person hot tub holds 719 liters of water. Modern hot tubs became popular outside of Japan starting in about 1940.
It's about one-fourth as big as a Concrete Mixer Truck
In other words, 2,700 liters is 0.250 times the size of a Concrete Mixer Truck, and the size of a Concrete Mixer Truck is 4 times that amount.(a.k.a. cement mixer, a.k.a. cement mixer truck, a.k.a. cement transport truck, a.k.a. concrete mixer, a.k.a. concrete transport truck, a.k.a. in-transit mixer)(standard size; drum capacity)
A concrete mixer truck has a drum volume of up to 11,000 liters. Concrete mixer trucks can be in transit for about 90 minutes before the concrete dries — if the concrete dries while in the drum, jackhammers or even dynamite must be used to remove it.
It's about seventeen times as big as a Bathtub
In other words, the size of a Bathtub is 0.059 times 2,700 liters.(a.k.a. bath, a.k.a. tub) (for Bootz Industries Aloha 5 ft. Left Hand Drain Soaking Tub)
The capacity of a typical bathtub is 160 L. Historically, bathtubs have been made of various materials including marble, terracotta, silver, gold, and iron but the size and shape of the tubs has changed little in their 7,000 year history.
It's about forty times as big as a Car Gas Tank
In other words, 2,700 liters is 35.70 times the size of a Car Gas Tank, and the size of a Car Gas Tank is 0.028 times that amount.(for 2009 Ford Taurus)
A car gas tank (for example, that of a 2009 Ford Taurus) holds 75.7 L of gas. In contrast, the Curved Dash Oldsmobile — the first mass-produced car — had a fuel capacity of just 20 L.
It's about 45 times as big as a Beer Keg
It's about 250 times as big as a Basketball (packed)
In other words, 2,700 liters is 243.23582260 times the size of a Basketball (packed), and the size of a Basketball (packed) is 0.004111236533 times that amount.(64% packing density) (NBA official ball standards, Size 7)
A NBA official ball, manufactured by Spalding, is a Size 7 ball measures about 7.10421672870 liters. These balls have 4,118 pebbles each with a diameter of 2.5 mm
It's about 350 times as big as a Bowling Ball (packed)
In other words, 2,700 liters is 327.934560610 times the size of a Bowling Ball (packed), and the size of a Bowling Ball (packed) is 0.0030493888724 times that amount.(64% packing density) (USBC specifications; tenpin)
According to United States Bowling Congress specifications, a tenpin bowling ball should measure at least 10.795 cm (4.25 in) in radius for a total volume of about 5.26934397150 liters. Because regulation balls measure the same diameter irrespective of their weight, ball density varies by size and balls weighing less than about 5 kg (11 lbs) will float in water.