Answer:
114.33 cubic inches.
Step-by-step explanation:
The volume of a pyramid can be calculated using the formula below:

Since the completed puzzle is a square pyramid:

• The side length of the square, l = 7 inches
,
• The height of the completed puzzle,h = 7 inches
Therefore:

The number of cubic inches of space the completed puzzle will take up on a shelf is 114.33 cubic inches.