The relationship between the pressure and volume of a fixed amount of gas at a constant temperature is described with the Boyle's Law:
"For a fixed mass of gas, at a constant temperature, the product (pressure x volume) is a constant."
Pressure x Volume = constant
According to this, the absolute pressure and volume of a given mass of confined gas are inversely proportional, provided the temperature remains unchanged within a closed system. So, if the pressure is increased than the volume will be decreased.