Sally is filling glass containers

in the shape of cylinders with different colors of sand. Each cylinder has a radius of 4 inches and a height of 8inches.

Sally has 1,000 cubic inches of sand. How many containers can she fill completely.?

plz I really need help on this question.

v = pi r^2 h

= pi (16)8
= 402 in^3

just two is 804 in^3