Answer:
2141.76 cubic inches
Explanation:
Given that it measures 8.8 inches across a properly inflated basketball i.e. the diameter of each basketball is 8.8 inches.
So, the radius of the spherical ball is 
 inches.
 inches.
Now, a spherical solid has a volume given by 
 .
.
Hence, volume of air in side each basketball is = 
 cubic inches.
 cubic inches.
Therefore, the total volume of air inside six balls will be = 6 × 356.96 = 2141.76 cubic inches. (Answer)