It could be. It is certainly true that 2' X 2' X 2' is 8 cubic feet. But 8 cubic feet could be 1' by 1' by 8', or 2' by 1' by 4', or 1" X 12' X 8' or any of an infinite number of other possibilities.
John
Egw to Beta kai to Sigma
My calculator said it, I believe it, that settles it