A coconut is a fruit that is made up of a hard outer shell that is spherical. Inside, there is a thick layer of coconut meat that forms another spherical shell around the coconut milk.

If the diameter of an entire coconut is 5 inches, and the coconut meat is 1 inch thick, then there is room for approximately __ in3 of coconut milk.

What number correctly fills in the blank in the previous sentence?

Hint: Find the radius of the inside sphere and use that to calculate the volume.