Q173 5ft Cube vs 5 cu. feet. Does Pazio mean the difference literally, as in one is 125 cubic feet in volume, and one is 5 cubic feet in volume?

Asking this for the Watersinger ability, which specifies control of up to a 5 foot cube of water, which is roughly 3 and a half TONNES of water (125 cubic feet of water is 7,803 pounds) which seems like rather a lot.