Congratulations for your result. Now 5744 is quite a good rank. You know the cutoffs depend on various factors and that's why it changes every year. Now as you have mentioned that you'll be applying through open quota, so the cutoffs of open quota candidates are quite high. But you have an amazing rank in AEEE 2020. You can expect Computer Science and Engineering in Amrita School of Engineering, Amrithapuri Campus as the closing rank for CSE there lies around 6900 to 7000 rank for open quota candidates. So you have fair chances of getting CSE there. Not only Computer Science but you can get all other branches in Amrithapuri campus. Now this is based on previous few years' cutoffs and this year it might change. You can check the cutoffs of all branches of all campuses
http://engineering.careers360.com/articles/aeee-cutoff