Answer:
2143.57 cubic inches
see notes below regarding radius
Explanation:
vol of a sphere = 

Your problem doesn't make it clear but I think 8 in is the radius?
So assuming radius = r = 8:
vol of a sphere = 

vol of a sphere = 

vol of a sphere = 

vol of a sphere = 

 = (682 2/3) * 3.14 = 2143.57333333
So rounded is 2143.57