Answer:
About 770 cubic feet
Step-by-step explanation:
We'll be using the volume formula:
Volume = 3.14 * r^2 * h
insert the numbers:
volumes = 3.14 * 7^2 * 5
       = 3.14 * 49 * 5
       = 3.14 * 245
       = 769.3 volumes
If you were to round: about 770 cubic feet