The rules are clear you must be in Canada at least 730 days in 5 years, any time out of Canada does not count but your question is confusing. What do you mean 740 days is that all the time you complete in Canada between May 2013 and May 2018 ? Or are you saying if you go to India for a month between now and May 2018 you would be below 740 days even let alone meeting 730 days.