Is it possible to add a pool IP and port as record route instead of Vistrual address IP using SIP profile

You'll need to use an iRule to do this. The sip profile has an option to insert the Record-Route header. You would want to disable this (it's disabled by default) on the sip child profile applied to the Virtual Server. Then add an iRule like this:

when SIP_REQUEST_SEND {
    SIP::header insert Record-Route [LB::server addr]
}