```
Piston Displacement = (Bore^2 * Stroke * Number of Cylinders) / 1728
```
Where:
- Piston Displacement is measured in cubic inches (CID)
- Bore is the diameter of the piston in inches
- Stroke is the distance the piston travels in inches during one revolution
- Number of Cylinders is the number of cylinders in the compressor
In this case, the compressor has 2 bores and 3 strokes. Therefore, the piston displacement is:
```
Piston Displacement = (2^2 * 3 * 1) / 1728 = 0.00694 CID
```
Therefore, the piston displacement of the compressor is 0.00694 CID.