40 5/8 cubic centimeters
The firmula for the volume of a rectangular prism is:
lwh
l= length
w= width
h= height
Use the formula with the given dimensions:
(6 1/2) (2 1/2) (2 1/2)
= (16 1/4) (2 1/2)
= 325/8 or simplified to 40 5/8
Volume is measured in cubic units, cubic CENTIMETERS in this case.
Hope this helps!