Number of 4-digit numbers that are less than or equal to 2800 and either divisible by 3 or by 11, is equal to ____.

4 digit numbers less than 2800 and
(i) Divisible by 3 $=\{1002,1005,\dots \dots ..,2799\}\to 600$
(ii) Divisible by 11 $=\{1001,1012,\dots \dots .,2794\}\to 164$
(iii) Divisible by 33 $=\{1023,1056,\dots \dots .,2772\}\to 54$
$\therefore$ Required number of numbers$=600+164-54=710$