The volume \( V \) of a cube can be calculated using the formula:
\[ V = s^3 \]
where \( s \) is the length of a side of the cube.
Given that the side length \( s \) is 5 cm:
\[ V = 5^3 = 5 \times 5 \times 5 = 125 , \text{cm}^3 \]
Thus, the volume of the cube is \( 125 , \text{cm}^3 \).