Answer: 4/3 π 6³
Explanation:
Hi, to answer this question we have to apply the next formula: 
Volume of a sphere: 4/3 π r³ 
Replacing with the values given: 
V = 4/3 π 6³ 
If we solve the expression: 
V = 4.18 (6)^3 
V = 904.77 cubic units 
Feel free to ask for more if needed or if you did not understand something.