Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
How many times is the shot volume (cm3) less than 172.76?

### Inputs:
table_name: table, columns: ['gun class (pdr.)', 'shot diameter (cm)', 'shot volume (cm 3 )', 'approx. service bore (cm)', 'mass of projectile (kg)']

### Response:
SELECT COUNT shot diameter (cm) FROM table WHERE shot volume (cm 3 ) < 172.76