How high does the seawater rise in the bell when it is submerged?

if the cylindrical is 3 m in diameter and 4 m tall with an open botton, is submerged to a depth of 220 m in the ocean. The surface temperature is 25 degree celcius, and the temperature 220 m down is 5 degree celcius. The density of seawater is 1025kg/m^3.