reinflate to orignal shape

[mady3650]

hello, i am tring to make the cyan ballon object to deinflate and reinflate to its original shape, i tried to animate the volume in cloth bind but didnt work

also tried to use the inflate settings in modify binding but it dose not get the object back to its shape 

this is a link to the 3ds max file

https://mega.nz/file/88lyBa4D#VmL2cQD8Fx...ZOOvsZcvDo

can someone please help