This is the first time JIPMER will be giving admission on the basis of Neet Score. So we don't have any idea about the previous year's cutoffs as we don't have any reference. But there are total 200 seats (JIPMER Puducherry (150) and Karaikal campus (50)) offered for MBBS in JIPMER. So it can be expected that an all India rank within 250 to 300 can fetch you a seat in JIPMER Puducherry while 45 seats are for unreserved category and 15 seats are reserved for general category in JIPMER karaikal campus. The more you'll get in exam, the higher will be the chances. Now as you told, you have scored 653 in Neet 2020 out of 720 based on the answer keys, so you can expect all India rank within top 800 to 1000. However this is your expected rank and can differ from the actual one. So based on this, it may be difficult to get JIPMER Puducherry as the cutoffs of Puducherry will be higher than Karaikal campus but you can expect JIPMER Karaikal campus. Also you can use our Neet college Predictor tool to know about your admission possibilities through Neet based on your score and rank
http://medicine.careers360.com/neet-college-predictor?icn=QnA&ici=qna_answer