"ChewbaccaGirl's" answer is correct, and nicely explained,
so I don't need to repeat it. I'll just give you another way to
look at the problem, and that might help you focus in on it:
Information:
The volume of a cube whose edges are all 1 centimeter long is
(length) x (width) x (height)
= (1 cm) x (1 cm) x (1 cm) = 1 cm³
Now here's another way to look at the problem:
Alberto has 250 teeny tiny paper cups,
with 1 ounce of water in each one.
Which two jars could Alberto pour all of his
tiny cups of water into:
-- a 256-ounce jar
-- a 248-ounce jar
-- a 236-ounce jar
-- a 260-ounce jar
-- a 225-ounce jar ?
Does that help you see what's going on here ?